and also speak of and preach them, and in writing learnedly prove them; but when left to his own thought, from his own infernal love he thinks against them and denies them.  From which it is obvious that the understanding can be in spiritual light even when the will is not in spiritual heat; and from this it also follows that the understanding does not lead the will, or that wisdom does not beget love, but only teaches and shows the way, — teaching how a man ought to live, and showing the way in which he ought to go.  It further follows that the will leads the understanding, and causes it to act as one with itself; also that whatever in the understanding agrees with the love which is in the will, the love calls wisdom.  In what follows it will be seen that the will does nothing by itself apart from the understanding, but does all that it does in conjunction with the understanding; moreover, that it is the will that by influx takes the understanding into partnership with itself, and not the reverse.

245.  The nature of the influx of light into the three degrees of life in man which belong to his mind, shall now be shown.  The forms which are receptacles of heat and light, that is, of love and wisdom in man, and which (as was said) are in threefold order or of three degrees, are transparent from birth, transmitting spiritual light as crystal glass transmits natural light; consequently in respect to wisdom man can be raised even into the third degree.  Nevertheless these forms are not opened except when spiritual heat conjoins itself to spiritual light, that is, love to wisdom; by such conjunction these transparent forms are opened according to degrees.  It is the same with light and heat from the sun of the world in their action on plants on the earth.  The light of winter, which is as bright as that of summer, opens nothing in seed or in tree, but when vernal heat conjoins itself to that light then the heat opens them.  There is this similarity because spiritual light corresponds to natural light, and spiritual heat to natural heat.

246.  This spiritual heat is obtained only by fleeing from evils as sins, and at the same time looking to the Lord; for so long as man is in evils he is also in the love of them, for he lusts after them; and the love of evil and the lust, abide in a love contrary to spiritual love and affection; and such love or lust can be removed only by fleeing from evils as sins; and because man cannot flee from evils from himself, but only from the Lord.  He must look to the Lord.  So when he flees from evils from the Lord, the love of evil and its heat are removed, and the love of good and its heat are introduced in their stead, whereby a higher degree is opened; for the Lord flowing in from above opens that degree, and then conjoins love, that is, spiritual heat, to wisdom or spiritual light, from which conjunction man begins to flourish spiritually, like a tree in spring-time.